Kjetil Husebø (aka Optical Substance) is a norwegian
keyboard-player and a classically trained piano-player with a
background from such varied musical landscapes
pop, cross-over, folk and jazz.
He debued with his own band;
Coffee Pain at Nattjazz in Bergen in 1996 and he
also wrote commissioned music to the municipality of Modalen
in 1997. The same year he began to collaborate with
Jigme Drupka (singer from Buthan) and he also
played with Dj Erot (RIP) both in studio and on
In 1999, Kjetil focused mainly on his studies at the
University of Oslo (major-degree in History of Ideas in 2005).
In 2000 he also played with the norwegian pop-band